CVE-2026-90219 (GCVE-0-2026-90219)
Vulnerability from cvelistv5
Published
2026-09-17 16:07
Modified
2026-10-19 08:59
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Free debugfs on registration failure c4iw_alloc() creates the per-device debugfs tree (dev->debugfs_root via setup_debugfs()), but it is removed only in c4iw_remove(), not in c4iw_dealloc(). When RDMA device registration fails, the registration worker's err_dealloc_ctx path calls c4iw_dealloc() directly, bypassing c4iw_remove(), so the debugfs dentries leak and outlive the freed c4iw_dev. Move debugfs_remove_recursive() into c4iw_dealloc() so every path that frees ctx->dev also removes its debugfs tree.
References
Impacted products
Vendor Product Version
Linux Linux Version: 49ea0c036ede81f126f1a9389d377999fdf5c5a1
Version: 49ea0c036ede81f126f1a9389d377999fdf5c5a1
Version: 49ea0c036ede81f126f1a9389d377999fdf5c5a1
Version: 49ea0c036ede81f126f1a9389d377999fdf5c5a1
Version: 49ea0c036ede81f126f1a9389d377999fdf5c5a1
Version: 49ea0c036ede81f126f1a9389d377999fdf5c5a1
Version: 49ea0c036ede81f126f1a9389d377999fdf5c5a1
Version: 49ea0c036ede81f126f1a9389d377999fdf5c5a1
Version: 98fa991017981b52dcc4dc3924fc8e1e83e41bf4
Version: af92e4a595e006b498c44b617ea38f697eca3469
Version: 9c0cec79e5c914662c2cf98b4a729c0fcc8c872e
Version: 4.19.130   ≤
Version: 5.4.49   ≤
Version: 5.7.6   ≤
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Free debugfs on registration failure\n\nc4iw_alloc() creates the per-device debugfs tree (dev-\u003edebugfs_root via\nsetup_debugfs()), but it is removed only in c4iw_remove(), not in\nc4iw_dealloc().  When RDMA device registration fails, the registration\nworker\u0027s err_dealloc_ctx path calls c4iw_dealloc() directly, bypassing\nc4iw_remove(), so the debugfs dentries leak and outlive the freed\nc4iw_dev.\n\nMove debugfs_remove_recursive() into c4iw_dealloc() so every path that\nfrees ctx-\u003edev also removes its debugfs tree."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:59:55.119Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/459b59f7ed56511d6529311cb4e5e482ebfcfb8e"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd60992f09b7e83bfd3c76e3bb06b29f3e2fa0a8"
        },
        {
          "url": "https://git.kernel.org/stable/c/c332d9e7dce234d8bef78271d003a68ee943b61b"
        },
        {
          "url": "https://git.kernel.org/stable/c/f98e894ec029a752cf9c7f7834741bead0fb463d"
        },
        {
          "url": "https://git.kernel.org/stable/c/479a7f90060e62bdd9bb4036ec0a70bf460f6d23"
        },
        {
          "url": "https://git.kernel.org/stable/c/046425412529dbfca1433c8bef5641b271b4ab2a"
        },
        {
          "url": "https://git.kernel.org/stable/c/ea41b5630fa3d9877ce9ed8832cf5575f742bfbb"
        },
        {
          "url": "https://git.kernel.org/stable/c/fe5c16bb6252dea6025b748257ddc3b2665495b0"
        }
      ],
      "title": "RDMA/cxgb4: Free debugfs on registration failure",
      "x_generator": {
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      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90219",
    "datePublished": "2026-09-17T16:07:30.778Z",
    "dateReserved": "2026-09-11T19:38:34.793Z",
    "dateUpdated": "2026-10-19T08:59:55.119Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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